Johnny Manziel was paid $7,500 for an autograph session that took place last January, according to ESPN. The report cites an "East Coast autograph broker" as its source.

Manziel, quarterback at Texas A&M and the reigning Heisman Trophy winner, is said to have signed 300 mini- and full-sized helmets, the report says, at a Walter Camp Football Foundation event.

ESPN says it has viewed two videos of Manziel signing the helmets, but has not seen video of Manziel accepting payment. At one point, Manziel is heard as saying, "You never did a signing with me," ESPN says.